10 H. JONSSON 



Antithamnion floccosum (Mull.) Kleen, Stromf., 70, p. 32. 

 E. Icel., SW. Icel., S. Icel. 



Ceramium acanthonotum Carm., Kjellm., 36, p. 171. 

 SW. Icel., S. Icel. 



Ceramium Deslongchampii Chauv., Petersen, 57, p. 108; Ceramium 

 rubrum ex pte. Jonsson, 31. 



SW. Icel.: Reykjavik (L. Kolderup Rosenvinge, 5 /e 1886). 



Ceramium fruticulosum Kutz., Petersen, 57, p. 108. 

 SW. Icel. : Seltjarnarnes (Helgi Jonsson, 28 /8 1907). 



Ceramium circinnatum Ag., Petersen, 57, p. Ill ; Ceramium rubrum 

 ex pte. Jonsson, 31. 



SW. Icel.: Stykkisholmur (Helgi Jonsson, 16 /e 1897), Skerjafjordur 

 (Helgi Jonsson, 10 /7 1905). 



Ceramium arborescens J. Agardh, Petersen, 57, p. 112; Ceramium 

 rubrum ex pte. Jonsson, 31. 



N. Icel.: Hrisey (Helgi Jonsson, 2 /7 1898); NW. Icel.: Latravik in Adal- 

 vik (C. H. Ostenfeld, 8 /7 1896); SW.Icel.: Reykjavik (L. Kolderup Rosen- 

 vinge, 5 /6 1886). 



Ceramium atlanticum Petersen, 57, p. 112; Ceramium rubrum ex 

 pte Jonsson, 31. 



SW.Icel.: Grotta (Helgi Jonsson, 17 /e 1908), Hafnarfjordur (Hjalmar 

 Jensen, 7 /5 1890); S. Icel.: Sta6ur (C. H. Ostenfeld, 12 /e 1896), Eyrarbakki 

 (Helgi Jonsson, 31 /5 1897), Vestmannaeyjar (Helgi Jonsson, 14 /5 1897). 



Ceramium rubrum (Huds.) Agardh, Petersen, 57, p. 113; Jonsson, 

 31, ex pte. 



N. Icel., NW. Icel., SW. Icel., S. Icel. 



Rhodochorton Rothii (Turt.) Naeg., K. Rosenv., 61, p. 791. 

 E. Icel., N. Icel., NW. Icel., SW. Icel. (common), S. Icel. 



Rhodochorton repens H. Jonsson, 31. 

 S. Icel. 



Rhodochorton minutum Suhr. Descr. in Reinke's Atlas (59), Fig. 

 Reinke's Atlas T. 40. 

 SW. Icel. 



Rhodochorton penicilliforme (Kjellm.) K. Rosenv., Les Algues ma- 

 rines du Greenland in Ann. Sc. nat., 7 e Ser., XIX. 

 E. Icel., N. Icel., NW. Icel., SW. Icel. 



